Value Collection D39165 Hex Head Cap Screw 5/8-11 X 8 in

Product Description

The VALUE COLLECTION D39165 is a partially threaded hex head cap screw engineered for high-strength fastening applications. It features a 5/8-11 UNC thread size and an 8-inch length under head, manufactured from Grade 8 steel with a zinc yellow dichromate finish that provides corrosion resistance. Conforming to ASME B18.2.1 standards, this fastener is suited for structural, mechanical, and industrial assemblies where elevated tensile strength and dimensional consistency are required. Electricians, pipefitters, millwrights, and general maintenance trades install this type of fastener in equipment mounting, flange connections, and structural bracketing.

This cap screw is used across a wide range of trade and industrial applications including HVAC equipment mounting, electrical enclosure installation, plumbing equipment support structures, and general mechanical assembly. The Grade 8 rating makes it appropriate for high-load, high-vibration environments where lower-grade fasteners would be inadequate. Partial threading allows for a smooth shank section between the head and threaded portion, which is preferred in certain clamping and alignment applications.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish for corrosion resistance in moderate environments
• Partially threaded shank per ASME B18.2.1 dimensional standards
• 5/8-11 UNC thread form for broad compatibility with standard nuts and tapped holes
• 8-inch length under head suits deep-reach and thick-stack fastening applications

Compatibility

Designed as a standard UNC fastener for use with 5/8-11 hex nuts, coupling nuts, and tapped holes in inch-system assemblies conforming to ASME B18.2.1 specifications.

Installation Notes

Installation is performed by qualified tradespeople using appropriate hand or power tools rated for Grade 8 fasteners. Always clean and inspect mating threads before installation to prevent galling or cross-threading. Follow applicable torque specifications from the equipment manufacturer or structural engineer of record. Never substitute a lower-grade fastener in a position specified for Grade 8 hardware.